A small plane mirror kept at the centre ...

A small plane mirror kept at the centre of a sphere of diameter 3 m, makes 12 revolution per second. A thin light beam is made incident on the mirror. The linear speed of the light spot on the sphere, formed after reflection-from the mirror is:

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A small plane mirror kept at the centre of a sphere of diameter 3 m, makes 12 revolution per second. A thin light beam is made incident on the mirror. The linear speed of the light spot on the sphere, formed after reflection-from the mirror is:

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